Book clamp



Dec. 1, 1925. 1,564,113

J.RAUHOFER Boox CLAMP Filed Feb. 25; 1924 2 Sheets-Sheet 1 Patented Dee.1, 1925.

JOHN RAUHOFER, 0F BETHLEHEM, PENNSYLVANIA..

BOOK CLAMP.

Application filed February 25, 192e.

To all 'who-m t may concern:

Be it known that I, JOHN RAUr-rornn, va citizen ot the United States,residing at Bethlehem, in the county oi Northampton and State ofPennsylvania, have invented new and useful Improvements in Book Clamps,ot which the following is a specitication.

The object of this invention is to provide a clamp especially useful forholding a book on the music rack ot'an organ, piano, or the like, butalso useful under all similar conditions.

A further object is to avoid the necessity ot holding the bool; open bythe means usually employed, and to provide a device which may remain inposition at all times, and may be employed as occasion may require.

A still further object is to provide a pivotally mounted arm with atransparenty plate for direct Contact with the page of the book or musicsheet to be held, so that there may be no interference with the readingof the words or music.

1With the foregoing and other objects in view, the invention consists inthe novel construction and arrangement of elements disclosed, it beingunderstood that modifications may be made within the scope ot' the claimwithout departing from the spirit of the invention.

In the accompanyingl drawings,

Figure 1 shows the device in front eleva tion. f

Figure 2 is a top plan view.

Figure 3 is an edge view or side elevation. Figure 4 shows the clampingarm in side elevation, and the devices connected therewith in section.

Figures 5, G and 7 are detail views, Figure G being a section on line 66 of Figure 1.

The base or rack 10 has a lower ledge or outstanding` element 11, formedat the central portion as shown at 12 for accommodating the devicesmounting the clamping arm. This arm 14,- is connected by pivot 15 with ashort arm or stud 16, the latter having a reduced threaded end 17 andserving to mount a glass or other transparent plate 18 shown as being ofcircular form and adapted Serial No. 695,106.

to engage a music sheet, or the open page ot' a book, from which themusician desires to play. Threaded end 17 is engaged by a nut 19, andthe glass permits of the reading ot practically all portions ot thepage, while the book is suitably held without the use of other means Arm14tincludes a lower enlarged portion 20 having an annular channel 21 andan opening 22 accommodates a small bolt or screw 23 passing through theenlarged end oi the arm and through the ears or 'forked portion 2li otscrew 9.5. This screw has an outer bore 26 and a small inner bore 2Tboth extending longitudinally. Spring 21 in channel 21 is in t'rictionalengagement with one of the ears.

Screw 25 is threaded into a sleeve 28 mounted as shown with reference tothe central portion of ledge 11, and this sleeve or bushing is engagedby screw 29 passing throughl the base 10, and the screw includes a stem30 entering the small bore oi screw 25. Spring 30 encircles stem 29 andis housed within the larger bore ot the screw, the spring providingrictional engagement at 31.

It willbe observed that the arm 14 is movable outwardly from base orrack 10, and is also movable to the right and left, about thelongitudinal anis of sleeve 28, and is retained by the spring in anadjusted position. y

What I claim is:

In a device of the class described, a sup porting element, an armpivoted thereon and movable toward and away from said element, rotatablemeans :for mounting the pivoted arm, and devices for retaining anadjusted position of the rotatable means and ot the am connected withthe rotatable means, the device for retaining the rotatable meansincluding a coiled spring pressing on said means, a tubular elementreceiving the rotatable element and spring, and a screw retaining thetubular element and imparting end thrust to the spring for forcing itagainst the rotatable means.

In testimony whereof I aiiixiny signature.

JOHN RAUHOFER.

